. >> this professor teaches law at peking university. he led a group of 70 experts who signed a series of proposals submitted to the government in december. shortly after xi jinping became communist party chief. they described chinese people as frustrated with corruption, abuse of power and growing wage gap between rich and poor. they said this frustration would reach a critical point if political reform didn't move ahead. they warned chinese society could face a violent revolution and fall into chaos. he posted proposals on his website but he said it was erased within 24 hours. >> why chinese society is so unstable today? precisely because of a lack of credible reform. it's because of this lack the government or the government policies, government actions are not responsible to people. so that's why our air is so dirty. our underground waters got into trouble. so many people, especially the peasants, lost their land. we need a reform to start with. because the government has only emphasized economic reform. they only pay lip service to